Captain Z-ro uses his time machine to protect humankind at various junctions in history.
Public domain status: Registered as a published film 14 Jan 55 (LP11100). No renewed.
Subsequent copyright re-registration rejected in 1985:
Captain Z-Ro/Attila the Hun. By Captain Z-Ro Productions, Inc.
Type of Work: Cancelled Registration Cancelled Registration Number: PA0000216073 PA reg. cancelled. Title: Captain Z-Ro/Attila the Hun. By Captain Z-Ro Productions, Inc.